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Technical Data Sheet
PartsTable / MRO / 21637
21637 ✓ Verified by PartsTable
Esselte · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The RELAY,ELECTROMAGNETIC is a Esselte industrial component. Key specifications include material: STEEL OVERALL, end_style: MACHINED HALF LOOP BOTH ENDS, design_type: CLOSED, hook_radius: 0.127 INCHES NOMINAL BOTH ENDS IN, coil_quantity: 22, opening_width: 0.062 INCHES NOMINAL BOTH ENDS IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-019-1504, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MRO→ MRO_GENERAL→ 21637
NSN: 5950-00-019-1504
FSC: 5950
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleMACHINED HALF LOOP BOTH ENDS
design_typeCLOSED
hook_radius0.127 INCHES NOMINAL BOTH ENDS IN
coil_quantity22
opening_width0.062 INCHES NOMINAL BOTH ENDS IN
overall_length1.132 INCHES MINIMUM AND 1.136 INCHES MAXIMUM IN
inside_diameter0.178 INCHES NOMINAL IN
overall_diameter0.500 INCHES NOMINAL IN
style_designatorCYLINDRICAL
spring_free_length0.870 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND
NSN5950-00-019-1504
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Esselte RELAY,ELECTROMAGNETIC TITLE COMPONENT PN 21637 MFR Esselte RELAY,ELECTROMAGNETIC
KEY FEATURES
•
MOUNTING CONFIGURATION: ONE NF0.190-32 THD HOLE
•
OVERALL DIAMETER: 0.500 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING CONFIGURATIONONE NF0.190-32 THD HOLE
OVERALL DIAMETER0.500 INCHES NOMINAL IN
MATERIALSTEEL
OVERALL LENGTH1.132 INCHES MINIMUM AND 1.136 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
21637Interchangeable
interchangeable cross-reference
interchangeable
5EX32Interchangeable
interchangeable cross-reference
interchangeable
717201Interchangeable
interchangeable cross-reference
interchangeable
B8QH-4067-BInterchangeable
interchangeable cross-reference
interchangeable
10073-7314Interchangeable
interchangeable cross-reference
interchangeable
215637Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21637?
21637 is a RELAY,ELECTROMAGNETIC manufactured by Esselte. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21637?
There are 6 known substitutes for 21637: 21637, 5EX32, 717201 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21637?
21637 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-019-1504. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026